42231399 has 8 divisors (see below), whose sum is σ = 64352640. Its totient is φ = 24132216.

The previous prime is 42231389. The next prime is 42231403. The reversal of 42231399 is 99313224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42231399 - 2⁵ = 42231367 is a prime.

It is a super-2 number, since 2×42231399² = 3566982122994402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42231359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1005489 + ... + 1005530.

It is an arithmetic number, because the mean of its divisors is an integer number (8044080).

Almost surely, 2^42231399 is an apocalyptic number.

42231399 is a deficient number, since it is larger than the sum of its proper divisors (22121241).

42231399 is a wasteful number, since it uses less digits than its factorization.

42231399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011029.

The product of its digits is 11664, while the sum is 33.

The square root of 42231399 is about 6498.5689963253. The cubic root of 42231399 is about 348.2398679866.

The spelling of 42231399 in words is "forty-two million, two hundred thirty-one thousand, three hundred ninety-nine".